For my assignment I was asked to complete a journal for the Portand After School Program. I have completed it, but I know I did something wrong because when I try to do the second part which is a trial balance it is not balancing out right. can some one please help me correct my mistakes?

(a) July 1, 20XX— Received unrestricted donation check in the amount of $15,000 from the Multnomah County Department of Health and Human Services.
Debited Cash $15,000
Credited Revenue $15,000

(b) July 19, 20XX—Paid Great Northwest Insurance Company $9,000 for six more
months of fire and liability insurance coverage.
Debited Prepaid Insurance $9,000
Credited Cash $9,000

(g) December 31, 20XX—To account for $1,750 in fees from parents earned in the first six months of operations, but collected in the second six months.
Debited Accounts Receivable $1,750
Credited Revenue $1,750

(h) December 31, 20XX—To account for $3,000 in parent fees earned in the second six months of operations, but not yet collected.
Debited Accounts Receivable $3,000
Credited Revenue $3,000

(i) December 31, 20XX—To account for expenses (John’s Deli) in the amount of $1,500 incurred during the first six months of operations, but paid in the second six months.
Debited Expense $1,500
CreditAccount Payable $1,500

For the rest of the transactions I didn't notice anything wrong
Hopefully your trial balance checks out, but i recommend checking it more than once because the trial balance is tricky, at least it is for me.